New 'The Sing-Off' judge Sara Bareilles co-hosted the fourth hour of 'Today' (weekdays, 9AM ET on NBC) while Kathie Lee Gifford was off shooting her 'Hot in Cleveland' cameo. Bareilles, who's a sweetheart by nature, talked about the challenge of giving singers negative feedback, sang some a capella of her own and hoola-hooped with Hoda.

Bareilles struggled to figure out how to provide substantive criticism without coming off like a jerk. "It's hard to be critical sometimes. I see that now as I'm watching the show be aired, and I remember feeling self-conscious about wanting to point out places where they need to make improvements," she said.
Bareilles then brought out a few friends and sang an a capella version of her song 'Gonna Get Over You.' Then she and Hoda did some hoola-hooping. All in a day's work.